Re: [CAD_CAM_EDM_DRO] Re: Counterweighting the Z axis ?; Power off position holding ?

Kim, click on the URL for this group which is at the bottom of every
post and select the photos section. It is after the various picture
folders in the main folder, so to speak. You should browse these photos
because you'll see many examples of this and similar issues that you
will face and you'll see how others have solved these problems. Just as
there is a wealth of knowledge in the old posts, the photos section is
also a great resource for newcomers to the group.

Cheers, Peter

Kim Lux wrote:

>Hi Peter.
>
>Thanks for the reply. Would you happen to have a link for those photos
>?
>
>Kim
>
>On Tue, 2003-07-08 at 09:56, Peter R wrote:
>
>>I've had good results with two 150lb gas springs from McMaster Carr. If
>>you look in the photos section for " NEMA 42 - Gas Springs" you'll see
>>how I fitted them to my knee mill. The knee is raised/lowered by a ball
>>screw. With power removed, the knee always stays where it is. You may
>>be able to adapt the same general idea to your machine.
>>
>>My machine doesn't look as clean now as it did in Feb 2002... Plus it
>>has since been converted to servos for faster rapids.
>>
>>Cheers, Peter
>>
>>Kim Lux wrote:
>>
>>>Glad to hear I am not the only one.
>>>
>>>The problem with springs is that their force varies with where the head
>>>is. Maybe they could be adjusted for zero force in the home position.
>>>That wouldn't help for an EStop though.
>>>
>>>A regulated air cylinder could give a constant force with any position,
>>>but I'm worried the air dynamics would mess up the head motion.
>>>
>>>So far the best solution seems to be to counter weight it and/or apply a
>>>bit of drag to the ballscrew drive.
>>>
>>>Kim
>>>
>>>On Tue, 2003-07-08 at 08:46, tsalaff wrote:
>>>
>>>>Kim,
>>>>
>>>>I'm dealing with the same problem right now although my Z axis is only
>>>>40 lb.. Going to try making brackets to anchor support springs. Will
>>>>report on how these work.
>>>>
>>>>>motor the milling head will slide down the column as soon as power is
>>>>>removed from the servo.
>>>>>
>>>>>Kim Lux <lux@d...>
>>>>>
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>>OFF Topic POSTS: General Machining
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>>http://www.metalworking.com/news_servers.html
>>
>>http://groups.yahoo.com/group/jobshophomeshop I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list.
>>
>>NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
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